JPH06122023A - Method for creating bending data in bending machine - Google Patents

Abstract

PURPOSE:To easily and quickly and prepare a bending data with a high precision when a work is bent by a bending machine at a specified bending position to make a box body. CONSTITUTION:Data relating to the cross section shapes of the front direction and side direction of the box body as a product are inputted and data relating to the opposite shape at a corner part of the work are selected from a pattern prepared in advance, data relating to the developed size of the box body in consideration of the elongation allowance of the work 1 based on these data are operated and further data relating to positioning positions and bending positions by positioning blocks 4a-4e of the work are operated. Furthermore, data relating to the positions of the corner parts are made so that they can be corrected based on experience values.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of creating bending data when a box is manufactured by bending a work at a predetermined bending position using a bending machine such as a panel former. is there.

[0002]

2. Description of the Related Art A panel former is generally known as a bending machine for manufacturing a box body by bending a plate-shaped work. This panel former fixes a work conveyed in the horizontal direction with two upper and lower pressing dies, and rotates it around the blade edge while pressing a specially shaped die against the end surface of the work protruding from these dies. The bending process is performed. In that case, the work carried into the folding machine is positioned by the centering device at a predetermined position,
After that, it is clamped by the clamp member of the manipulator and moved to the bending position. Then, when performing multiple bending, when the bending of one side is completed, the work is rotated by the manipulator and positioned at the next bending position. In addition, such a series of bending operations is N
It is controlled by the C device.

By the way, conventionally, the following method has been used as a method of creating bending data used when a box is manufactured from a plate-like work by controlling the NC device as described above. That is, the first method is a method of creating a development view of a product from the product shape to be processed, and performing processing based on the development data including the outline, bending position, and corner shape obtained as a result. Method 2 is
This is a method of performing processing based on data relating only to the developed outline of the work.

[0004]

However, in the first method, it is necessary to create a development drawing in the previous step and to input data relating to the shape and the bending angle as bending data, which is extremely difficult. In addition to the problem that it is complicated and easy to make mistakes, the data related to the expansion margin and the corner shape of the work used when creating the development drawing are slightly different depending on the material of the work, the bending radius and the characteristics of the bending machine. There was a problem that the data could not be created accurately, and these data had to be corrected while actually performing the bending work.

On the other hand, in the second method, since various data are obtained with reference to the developed lengths in the X-axis direction and the Y-axis direction, respectively, there is a large variation in the pre-processing of the work, and therefore the outer shape is large. There is a problem in that the pitch, parallelism, and squareness between the line and each bending line cannot be accurately obtained, and a gap or overlap occurs at the butted portion.

The present invention has been made in view of the above problems, and creates bending data when a box is manufactured by bending a work at a predetermined bending position using a bending machine. It is an object of the present invention to enable it to be performed easily, quickly and with high accuracy.

[0007]

In order to achieve the above object, a bending data creating method in a bending machine according to the present invention is a method for bending a work at a predetermined bending position to produce a box body. A method of creating bending data, in which the expansion allowance of the work was considered based on the data related to the cross-sectional shape of the front and side directions of the box and the data related to the butt shape of the corner of the work prepared in advance. It is characterized in that data relating to the expanded size of the box is calculated, and data relating to the positioning position and bending position of the workpiece are calculated.

In this case, it is preferable that the data relating to the position of the corner can be corrected based on the empirical value.

[0009]

When the data relating to the cross-sectional shape of the box body as the product in the front direction and the side direction is input, and the data relating to the butt shape of the corner portion of the work is selected and input from the pattern prepared in advance, Data relating to the expanded size of the box body in consideration of the expansion margin of the work is calculated, and data relating to the positioning position and bending position of the work are calculated.

In this case, if the data relating to the position of the corner portion is corrected based on the empirical value, it becomes possible to obtain more accurate bending data.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A concrete embodiment of a bending data creating method in a bending machine according to the present invention will be described with reference to the drawings. FIG. 1 is a schematic plan view of a panel former according to an embodiment of the present invention. As shown in the figure, the panel former of this embodiment includes a two-row transport belt 2 for loading and unloading a work 1, and a work that is disposed on both sides of the transport belt 2 and is loaded by the transport belt 2. A positioning table 3 for performing positioning (centering),
A plurality of positioning blocks 4a, 4b, 4c, 4d, 4e for positioning the work 1 on the positioning table 3.
And a bending mechanism portion 5 arranged in front of the positioning table 3 (right side in the figure) for bending the workpiece 1, and the workpiece 1 on the positioning table 3 is clamped to bend the workpiece 1 into the bending mechanism portion. While carrying in and out of 5,
The work 1 is provided with a manipulator 6 for rotating the work 1 in a horizontal plane for indexing. In FIG. 1, what is indicated by a chain double-dashed line A in the bending mechanism section 5 is a line indicating a bending position (bending line).

The plurality of positioning blocks 4a to 4e are movable in a direction of approaching and separating from the work 1 by driving of independent AC servo motors, and the bending mechanism portion 5 of the positioning blocks 4a to 4e is placed on the surface of the bending mechanism portion 5. The positioning blocks 4c and 4d on the working side are also movable in the loading direction of the work 1 by driving the AC servomotor. These AC servomotors are controlled by an NC device (not shown).

The positioning blocks 4a to 4e are also provided.
Of the positioning block 4 on the side facing the bending mechanism 5
c, 4d and the positioning block 4a on the upstream side in the work carrying-in direction are reference plane positioning blocks, and the positioning block 4e and the positioning block 4b, which are arranged opposite to these reference plane positioning blocks, press the work 1 against the reference plane positioning block. It is a pressing positioning block. Each positioning block 4a-4e has 2
Each air cylinder has a work contact member that is movable in a direction in which the work surface is projected from and retracted from the upper surface of the positioning table 3 (vertical direction) and in a direction in which the work 1 is moved in and out (front-back direction).

The manipulator 6 is a traveling frame 6a driven by an AC servomotor, and the positioning table 3 attached to the traveling frame 6a.
It is provided with a clamp member 6b that holds the workpiece 1 positioned above, and a drive mechanism (not shown) that rotationally drives the clamp member 6b around a vertical axis, and is also controlled by an NC device (not shown).

With the above-described structure, when the work 1 is carried in in a state where the center of the conveyor belt 2 and the center of the work 1 in the lateral direction are aligned in advance, each positioning block 4a to 4e is moved by the NC device. Is positioned at a predetermined position according to the size of the work, and then the positioning block 4a that defines the reference surface in the work loading direction moves to the raised position, and the loading of the work 1 by the transport belt 2 starts.

When the work 1 is carried into the predetermined position on the positioning table 3 in this manner, the reference plane positioning blocks 4c and 4d perpendicular to the work carrying-in direction, the pressing positioning block 4b in the work carrying-in direction and the work carrying-in direction are provided. Each positioning block moves to the ascending position in the order of the pressing positioning block 4e in the right angle direction. Next, the work contact member of the pressing positioning block 4b moves forward, and further the work contact member of the pressing positioning block 4e moves forward, so that the work 1 moves between the work contact members of the positioning blocks 4a to 4e. It is sandwiched and positioned at a predetermined position.

When the positioning is completed in this way, the work 1 is held by the clamp member 6b of the manipulator 6 and carried into the bending mechanism section 5, and the bending mechanism section 5 is held.
The required bending process is performed in. In addition, when performing multiple bending, when one side is bent, the work 1 is rotated by the manipulator 6 and positioned at the next bending position. Further, a series of such bending operations is controlled by an NC device (not shown).

In this embodiment, when a box body (product) 7 having an open upper surface as shown in FIG. 2 is manufactured, data relating to the bending process (bending data) is created using a personal computer. The following procedure is used. First, when a manufacturing drawing showing the product shape of the box body 7 is given, data concerning the cross-sectional shape in the X-axis direction (front direction) and the Y-axis direction (side direction) as shown in FIG. 3 is input from this manufacturing drawing. To do. Here, data relating to this cross-sectional shape includes leg length a, length from the center line of the base to the edge (1/2 of the base length) b, bending angle θ, bending radius R,
Each data of the plate thickness t is included.

Next, as shown in FIG. 4, the developed sizes (outline line positions) G and H and the bending positions I and J in consideration of the expansion margin s at the time of bending are calculated from the respective cross-sectional shapes. Calculated by calculation. It should be noted that the expansion size and the bending position are both given by the distance from the center line (reference line) as shown in the drawing, and in the case of the examples shown in FIGS. Is the leg length a, the base length b, and the extension margin s
Is given by

H = a + b-s Here, an empirical value set by the material, the plate thickness t, the bending angle θ, and the bending radius R is used as the value of the elongation allowance s. When the outline position and the bending position are calculated in this way, the corner shape is selected based on the abutting shape of the corner portion, and the correction value of the corner dimension, that is, the relative position P, Q from the bending position (Fig. (See 5).

Here, the corner shape is previously shown in FIG.
Five types of patterns related to the abutting shapes of the corners as shown in (a) to (e) are set, and any one of these patterns is selected. That is, in FIG. 6, (a) is a pattern in which only one edge of the work is bent, (b) is a pattern in which only one side edge of the work is bent, and (c) and (d) are shown.
(E) is a pattern in which two adjacent sides of the work are bent and the corners are butted against each other. (C) is a pattern in which the butted parts are in line contact, and (d) (e) is a pattern in which the butted parts are in surface contact. is there.

Further, since the correction values P and Q of the corner dimensions need to be corrected to the bending line obtained by calculation according to the mechanical characteristics of the panel former used, the material of the work, etc., the plate thickness, This allows the user to input an arbitrary value based on an actual empirical value corresponding to a bending radius, a gap, and the like. When inputting P and Q of these correction values, one of three types preset as the relationship between the bending position and the corner portion as shown in FIGS. 7A, 7B and 7C is selected. One will be selected and a predetermined value will be set. That is, in FIG. 7A, the vertical corner line and the horizontal corner line are taken inside and outside with respect to the bending position indicated by the alternate long and short dash line, and the bending position and the corner line are The magnitude relationship with the distances P and Q of P> Q,
In (b), the vertical corner line is placed outside the bending position, and the horizontal corner line is placed inside the bending position.
In addition, Q is shown, and (c) shows P = Q by taking both corner lines inside the bending position. When the P value and the Q value are thus determined, the distance from the center line to the corner line (corresponding to I + Q, J-P in FIG. 5) is next.
Is calculated from the relationship between the bending line and the corner line and the relationship between the corner line and the center line.

Then, as shown in FIG. 8, by inputting a distance C from a bending line A of the machine to a center line B parallel to the bending line A, the manipulator center (clamping member 6b) is moved to the positioning block 4a, 4b, 4
distances D ₁ , D ₂ , D ₃ and D _{4 in the} direction parallel to the bending line A to c and 4d, distances D ₅ and D ₆ from the bending line A to the positioning blocks 4c and 4d, and the manipulator center To positioning block 4e from position D ₇
And the distance (I, J) from the manipulator center to the bending position.

According to this embodiment, it is possible to easily and clearly obtain the data required for bending by directly inputting the sectional shape without creating a developed view of the bent product, and for each machine or material. It is possible to directly input the data based on the experience of, and thereby, it is possible to create accurate bending data and improve the quality of the product.

[0025]

As described above, according to the present invention, by inputting the data relating to the cross-sectional shape in the front direction and the side direction from the shape of the product to be bent, and the data relating to the butt shape of the corner portion, Since data necessary for bending can be obtained, it is possible to easily, quickly, and highly accurately create bending data when manufacturing a box.

In that case, if the data relating to the position of the corner portion is corrected based on the empirical value, it becomes possible to obtain more accurate bending data.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a panel former according to an embodiment of the present invention.

FIG. 2 is a perspective view of a product according to an embodiment of the present invention.

3 is a cross-sectional view in the X direction and the Y direction in FIG.

FIG. 4 is a plan view showing a work according to an embodiment of the present invention before processing.

FIG. 5 is a plan view showing a work according to an embodiment of the present invention with a corner portion cut off.

FIG. 6 is a diagram showing a corner shape setting pattern when creating bending data according to an embodiment of the present invention.

FIG. 7 is a diagram showing a setting pattern of corner dimensions when creating bending data according to an embodiment of the present invention.

FIG. 8 is a plan view showing a workpiece in a positioned state according to an embodiment of the present invention.

[Explanation of symbols]

 1 Work 4a, 4b, 4c, 4d, 4e Positioning block 7 Box

Claims (2)

[Claims] 1. A method of creating bending data when a box is manufactured by bending a work at a predetermined bending position,
Based on the data relating to the cross-sectional shape of the front and side directions of the box body and the data relating to the butt shape of the corner portion of the work prepared in advance, the expansion size of the box body in consideration of the expansion margin of the work Bending data creation method in a bending machine, characterized in that data relating to the positioning position and bending position of the work are calculated as well as data relating to the height. 2. The bending data creation method for a bending machine according to claim 1, wherein the data relating to the position of the corner portion can be corrected based on an empirical value.